Influence of chromium on the local structure and morphology of ferric oxyhydroxides

S. Suzuki; Y. Takahashi; T. Kamimura; H. Miyuki; K. Shinoda; K. Tohji; Y. Waseda

doi:10.1016/j.corsci.2003.10.011

Influence of chromium on the local structure and morphology of ferric oxyhydroxides

S. Suzuki, Y. Takahashi, T. Kamimura, H. Miyuki, K. Shinoda, K. Tohji, Y. Waseda

Research output: Contribution to journal › Article › peer-review

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Abstract

The extended X-ray absorption fine structure (EXAFS) method and transmission electron microscopy (TEM) have been used for characterizing the local structure and morphology of ferric oxyhydroxides, α-FeOOH and γ-FeOOH, with and without chromium. These ferric oxyhydroxide powders were prepared from aqueous solutions containing iron and chromium ions. Radial structural functions for iron obtained by Fe K edge EXAFS spectra showed that the linkage of structural units formed by FeO₆ octahedra in γ-FeOOH is distorted by chromium addition, while such distortion in α-FeOOH is not clearly detected. On the other hand, Cr K edge EXAFS spectra showed that the local structure around chromium does not necessarily correspond to the local structure around of iron, which is observed by Fe K edge EXAFS spectra. This suggests that the structural units containing iron and chromium are heterogeneously distributed in these ferric oxyhydroxides. The local structural information was discussed coupled with morphological features of these ferric oxyhydroxides observed by TEM.

Original language	English
Pages (from-to)	1751-1763
Number of pages	13
Journal	Corrosion Science
Volume	46
Issue number	7
DOIs	https://doi.org/10.1016/j.corsci.2003.10.011
Publication status	Published - 2004 Jul

Keywords

A. Iron, steel
B. TEM, XRD
C. Atmospheric corrosion, rust

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10.1016/j.corsci.2003.10.011

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title = "Influence of chromium on the local structure and morphology of ferric oxyhydroxides",

abstract = "The extended X-ray absorption fine structure (EXAFS) method and transmission electron microscopy (TEM) have been used for characterizing the local structure and morphology of ferric oxyhydroxides, α-FeOOH and γ-FeOOH, with and without chromium. These ferric oxyhydroxide powders were prepared from aqueous solutions containing iron and chromium ions. Radial structural functions for iron obtained by Fe K edge EXAFS spectra showed that the linkage of structural units formed by FeO6 octahedra in γ-FeOOH is distorted by chromium addition, while such distortion in α-FeOOH is not clearly detected. On the other hand, Cr K edge EXAFS spectra showed that the local structure around chromium does not necessarily correspond to the local structure around of iron, which is observed by Fe K edge EXAFS spectra. This suggests that the structural units containing iron and chromium are heterogeneously distributed in these ferric oxyhydroxides. The local structural information was discussed coupled with morphological features of these ferric oxyhydroxides observed by TEM.",

keywords = "A. Iron, steel, B. TEM, XRD, C. Atmospheric corrosion, rust",

author = "S. Suzuki and Y. Takahashi and T. Kamimura and H. Miyuki and K. Shinoda and K. Tohji and Y. Waseda",

note = "Funding Information: The authors would like to express gratitude to Prof. M. Saito and Prof. E. Matsubara for their valuable discussion with the authors. They also wish to thank Mr. Hayasaka and Mr. E. Aoyagi for their help on TEM operation. A part of this work was supported by the Grant-in-Aid for Scientific Research Fund from the Japan Society for Promotion of Science (no. 15656152).",

year = "2004",

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doi = "10.1016/j.corsci.2003.10.011",

language = "English",

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TY - JOUR

T1 - Influence of chromium on the local structure and morphology of ferric oxyhydroxides

AU - Suzuki, S.

AU - Takahashi, Y.

AU - Kamimura, T.

AU - Miyuki, H.

AU - Shinoda, K.

AU - Tohji, K.

AU - Waseda, Y.

N1 - Funding Information: The authors would like to express gratitude to Prof. M. Saito and Prof. E. Matsubara for their valuable discussion with the authors. They also wish to thank Mr. Hayasaka and Mr. E. Aoyagi for their help on TEM operation. A part of this work was supported by the Grant-in-Aid for Scientific Research Fund from the Japan Society for Promotion of Science (no. 15656152).

PY - 2004/7

Y1 - 2004/7

N2 - The extended X-ray absorption fine structure (EXAFS) method and transmission electron microscopy (TEM) have been used for characterizing the local structure and morphology of ferric oxyhydroxides, α-FeOOH and γ-FeOOH, with and without chromium. These ferric oxyhydroxide powders were prepared from aqueous solutions containing iron and chromium ions. Radial structural functions for iron obtained by Fe K edge EXAFS spectra showed that the linkage of structural units formed by FeO6 octahedra in γ-FeOOH is distorted by chromium addition, while such distortion in α-FeOOH is not clearly detected. On the other hand, Cr K edge EXAFS spectra showed that the local structure around chromium does not necessarily correspond to the local structure around of iron, which is observed by Fe K edge EXAFS spectra. This suggests that the structural units containing iron and chromium are heterogeneously distributed in these ferric oxyhydroxides. The local structural information was discussed coupled with morphological features of these ferric oxyhydroxides observed by TEM.

AB - The extended X-ray absorption fine structure (EXAFS) method and transmission electron microscopy (TEM) have been used for characterizing the local structure and morphology of ferric oxyhydroxides, α-FeOOH and γ-FeOOH, with and without chromium. These ferric oxyhydroxide powders were prepared from aqueous solutions containing iron and chromium ions. Radial structural functions for iron obtained by Fe K edge EXAFS spectra showed that the linkage of structural units formed by FeO6 octahedra in γ-FeOOH is distorted by chromium addition, while such distortion in α-FeOOH is not clearly detected. On the other hand, Cr K edge EXAFS spectra showed that the local structure around chromium does not necessarily correspond to the local structure around of iron, which is observed by Fe K edge EXAFS spectra. This suggests that the structural units containing iron and chromium are heterogeneously distributed in these ferric oxyhydroxides. The local structural information was discussed coupled with morphological features of these ferric oxyhydroxides observed by TEM.

KW - A. Iron, steel

KW - B. TEM, XRD

KW - C. Atmospheric corrosion, rust

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JF - Corrosion Science

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Influence of chromium on the local structure and morphology of ferric oxyhydroxides

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